Cannot read properties of undefined (reading 'dateString') about nightscout-librelink-up

[timoschlueter]

hi @convay89, I will take a look at this. Thanks for pointing it out.

[1spammer]

Same error here, i think i'm Missing Something.
Did a fresh Nightscout Setup via heroku.
Nightscout is up and running. Are there some Variables I forgot to set in Nightscout?

2022-05-02T19:37:33.144318+00:00 app[worker.1]: [info]: Starting cron schedule: */1 * * * *
2022-05-02T19:38:00.463465+00:00 app[worker.1]: [info]: Logged in to LibreLink Up
2022-05-02T19:38:00.684776+00:00 app[worker.1]: [info]: Found 1 LibreLink Up connection.
2022-05-02T19:38:00.685117+00:00 app[worker.1]: [info]: -> The following connection will be used: xxxxx (Patient-ID: xxxx-xxx-xxxx-xxxx-xxxx)
2022-05-02T19:38:00.189910+00:00 app[worker.1]: [info]: no authTicket.expires
2022-05-02T19:38:00.190143+00:00 app[worker.1]: [info]: renew token
2022-05-02T19:38:01.100264+00:00 app[worker.1]: [info]: Received blood glucose measurement items
2022-05-02T19:38:01.167682+00:00 app[worker.1]: [error]: Error getting glucose measurements Cannot read properties of undefined (reading 'dateString')

[blooolb]

The Problem is the empty Nightscout API response on new installations. The code expects at least a single returned entry to determine the timestamp the last entry. The code is missing a simple check whether any results were returned before trying to access them in line index.js#L188

return new Date(response.data.pop().dateString);

[timoschlueter]

This should be fixed in version 1.6.2 :)